Piper CHEROKEE WARRIOR PA-28-151 1995 Maintenance Manual page 547

PIPER CHEROKEE WARRIOR SERVICE MANUAL
United States environmental regulations require use of a
c o llection system when necessary to evacuate refrigerant from
air conditioner.
Check all environmental regulations for your local area before
servicing air conditioning system
TABLE XIV-I. TROUBLESHOOTING AIR CONDITIONER (cont.)
GAUGE INDICATION
Low suction pressure.
(Accompanied by icing
evaporator.
Low suction pressure.
(Evaporator not cold
enough)Suction gauge reads
vacuum indicating
evaporator lacks refrigerant.
High suction pressure.
Revised: February 28, 1995
NOTE
NOTE
PROBABLE CAUSES
Low air supply through
evaporator) ducts.
Very dirty evaporator fins and
coils.
Refrigerant undercharge.
Moisture freezing in expansion
valve. Valve shows frost.
Expansion valve inlet screen
clogged. Inoperative expansion
valve. Valve stuck closed or
capillary bulb has lost charge.
Restriction in liquid line.
Restriction will show frost.
Capillary bulb clamp loose on
suction line. Suction line shows
frost.
Expansion valve not closing.
Evaporator flooded. Suction line
frosted to compressor.
Compressor drive belt slipping.
Magnetic clutch slipping.
Leaking or broken compressor.
3A12
Island Enterprises
REMEDY
Repair blower or blower motor
Clean stoppage in air
Clean and flush with water.
Add refrigerant. Install new
dryer. Evacuate and charge.
Remove screen. Clean with
s o lvent and replace. Warm cap-
illary by holding in hand. If
suction pressure does not
charge, replace expansion
valve.
Locate restriction and repair.
Clean contact surfaces of suction
line and cap bulb Tighten
clamp.
Replace expansion valve.
Adjust belt tension.
Check electrical circuit for
proper voltage to clutch coil.
Clean oily clutch surfaces.
Replace compressor valves.
ACCESSORIES AND UTILITIES